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  1. No Access

    Article

    Scalable Production of High Performance Flexible Perovskite Solar Cells via Film-Growth-Megasonic-Spray-Coating System

    Commercialization of flexible perovskite solar cells requires an effective scalable coating system that overcomes the inadequate wettability of conventional polymer-based flexible substrates. In this study, we...

    Mincheol Park, Seung Chan Hong… in International Journal of Precision Enginee… (2023)

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    Chapter and Conference Paper

    Lightweight IEC 61850 Secure Communication Module for Microgrids

    Microgrid systems use distributed renewable energy resources to reduce dependency of traditional power systems. These energy devices are located at various places because of their characteristic and communicat...

    Yun-Sam Kim, Gunhee Lee, JungMin Kang in Advances on Broad-Band Wireless Computing,… (2017)

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    Article

    An approach to mitigate DoS attack based on routing misbehavior in wireless ad hoc networks

    The routing misbehavior is one of the most serious threats to wireless ad hoc networks where nodes are not forwarding messages correctly. Once the attack has been launched, nodes in the network are not able to...

    Gunhee Lee, Wonil Kim, Kangseok Kim… in Peer-to-Peer Networking and Applications (2015)

  4. No Access

    Article

    IO–MAC: An Enhancement of IEEE 802.11 DCF Using Implicit Ordering

    In this paper, we present a novel medium access control protocol which is based on the IEEE 802.11 distributed coordination function (DCF) and embeds new capability allowing stations to make use of implicit or...

    Hyeonmok Ko, Gunhee Lee, Cheeha Kim in Wireless Personal Communications (2013)